Mumps-Quick Sheet Infectious agent: The mumps virus is a paramyxovirus in the same group as influenza.
Mode of transmission: Direct or droplet contact with respiratory secretions of an infected person
Period of Communicability: The infectious period is considered to be from 6-7 days before parotitis onset to 9 days after parotitis onset.
CDC Case Definition and Classification (for purposes of public health reporting)
Clinical Case Definition
An illness lasting 2 or more days, with:
acute onset of swelling of the parotid or salivary glands, AND
without any other apparent cause (as reported by a physician)
Confirmed: a case that is laboratory confirmed or meets the clinical case definition and is epidemiologically linked to a confirmed case.
Probable: meets the clinical case definition but has no or noncontributory serologic or virologic testing, and is not epidemiologically linked to a confirmed case.
Up to 20% of persons infected with mumps are asymptomatic. An additional 40%-50% may have only non-specific or mild respiratory symptoms.
Twelve to 25 days, commonly 18 days, post exposure.
Prodromal symptoms are nonspecific and include myalgia, anorexia, malaise, headache and low-grade fever.
A swelling of the parotid glands, may be noted as earache, tenderness on touching the angle of the jaw, occurring 1-2 days after prodrome. Unilateral or bilateral, affecting any combination or single or multiple salivary glands, occurs in 30-40% of infected persons. Symptoms tend to decrease after one week, and are usually gone by 10 days.
Treatment of mumps is supportive. Although mumps vaccine is not thought to be effective in preventing infection of exposed persons, it can be given, as immunization will protect against subsequent exposure.
Mumps Immunity Acceptable evidence of mumps immunity is determined by meeting one of the following criteria:
1. Documentation of having received one dose of live virus mumps vaccine on or after 12 months of age. 2. Serological evidence of mumps antibodies.
3. Born before 1957.
Mumps is a reportable disease, and County or Local Health Departments must be notified within 24 hours when a case is suspected. A Communicable Disease Reporting Form and a Mumps Surveillance Worksheet must be submitted for each confirmed mumps case. Reporting of communicable disease is mandated under the Arizona Administrative Codes (R9-6-339).
Case Investigation process:
1. Upon notification of a suspected mumps case, interview the patient to collect the following information:
demographic information (name, age, address, and other pertinent demographic information)
Prodrome: low-grade fever, (non-specific) myalgia, anorexia, malaise, and headache
Onset of parotitis minus 6-7 days is probable start of infectious period.
1-2 days after prodrome; occurs in 30-40% of cases
Onset of parotitis plus 9 days is probable end of infectious period.
Mumps Outbreak Control Strategy: Schools (Pre-K through College) The following course of action is recommended to prevent the spread of mumps disease:
Exclude case for 9 days after the onset of parotid swelling.
Consider excluding known or presumed susceptibles born in 1957 or later for twenty-five days after parotitis onset in the last person diagnosed with mumps in the outbreak setting.
Conduct surveillance of contacts for two incubation periods (50 days) from most recent exposure, collect laboratory specimens from symptomatic contacts and forward to Arizona State Laboratory for mumps testing
Immunize all susceptibles greater than or equal to 12 months of age
Excluded persons who are asymptomatic can be readmitted immediately after vaccination.